'Can't install DotNetNuke (DNN) Development Project Templates on Visual Studio 2017

I'm trying to create a DNN project in my Visual Studio 2017 (version 15.9.19), like described in https://www.dnnsoftware.com/community-blog/cid/155422/visual-studio-2017-development-templates-for-dnn-dotnetnuke

When I'm searching for "Dotnetnuke" in Marketplace I've no results.

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If I try to install the vsix file downloaded from https://github.com/ChrisHammond/DNNTemplates/releases/tag/v09.01.00 I got this error:

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Any kind of solution/advice will be great!

Thanks in advance!



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